To this date there are still no Android smartphones with 64-bit processors inside. There are undoubtedly plenty of reasons why we haven't seen any devices with this type of processor show up on the market yet, but one we can't ignore is the fact that smartphones today don't really have a need to utilize the capacity of the 64-bit architecture. The iPhone 5S is the only current smartphone that sports a processor of this particular makeup, which is how we know that smartphones don't use up the capacity for which 64-bi chips are capable, because even the iPhone 5S doesn't take advantage of its full potential. Having a 64-bit processor sounds cool, and while it would seem to advance us forward in the world of mobile computing, there just isn't a need yet. Still, it's never a bad thing to be prepared, which is why many OEMs have already started development on such processors, so they can be used within devices when the time is right.
Sources at etnews are reporting that the Android OS doesn't quite support the 64-bit architecture which is more or less a true statement, and while that is one reason that we may not be seeing 64-bit chips enter into the mobile space so far, Google is working to optimize the OS for use with 64-bit processors. A more impacting reason for why we haven't seen some Android smartphones come out with 64-bit chips is something called the D-RAM market. With production costs rising for D-RAM memory, other complications could surface like OEMs having to change their production lines and end up delaying the whole process. This would ultimately result in less profit, and thus OEMs are holding off.
With these kinds of issues holding manufacturers back from entering into this particular market, rumors are suggesting that the first Android powered smartphones that house 64-bit chips will arrive sometime later this year, more closely around Q4 of 2014, or even Q1 of 2015. If that's the case, it seems that we will still have a long ways to go before we see any 64-bit smartphones, but this would give Google some time to make the perfect optimizations to the Android for 64-bit support, and manufacturers that are producing these 64-bit chips will have more time to optimize their processors. In the long run, it seems like Android could benefit from the wait, but do you think that being late to the 64-bit party will hurt them more than not?